ci: upgrade node version to deploy live and deploy preview

[fernandoseguim]

Description

Updated the Node.js version in the CI workflow from v18.20.7 to v20.0.0 to ensure compatibility with Firebase CLI v14.0.1.

Motivation and Context

The current CI workflow is failing due to a version mismatch between Node.js and the Firebase CLI. Firebase CLI v14.0.1 requires Node.js version >=20.0.0 || >=22.0.0, but our workflow was using Node.js v18.20.7. This update is necessary to resolve deployment failures and ensure proper CI/CD pipeline functionality.

How Has This Been Tested?

1. Verified that the CI workflow runs successfully using Node.js v20.0.0
2. Confirmed that Firebase deployment completes without version compatibility errors
3. Validated that all other CI steps continue to function as expected

Types of Changes

• Bug fix (non-breaking change that resolves an issue)

Checklist

• I have updated the documentation accordingly
• I have read the CONTRIBUTING document
• I have added tests to cover my changes where appropriate
• All new and existing tests passed

[sserrata]

Thanks @fernandoseguim...I went ahead and made the chain on the main branch since we use pull_request_target.